53327781 has 64 divisors (see below), whose sum is σ = 91392000. Its totient is φ = 30663360.

The previous prime is 53327761. The next prime is 53327797. The reversal of 53327781 is 18772335.

It is not a de Polignac number, because 53327781 - 2⁷ = 53327653 is a prime.

It is a super-2 number, since 2×53327781² = 5687704452767922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53327761) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1720236 + ... + 1720266.

It is an arithmetic number, because the mean of its divisors is an integer number (1428000).

Almost surely, 2^53327781 is an apocalyptic number.

It is an amenable number.

53327781 is a deficient number, since it is larger than the sum of its proper divisors (38064219).

53327781 is a wasteful number, since it uses less digits than its factorization.

53327781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 76 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 53327781 is about 7302.5872812312. The cubic root of 53327781 is about 376.4013487348.

The spelling of 53327781 in words is "fifty-three million, three hundred twenty-seven thousand, seven hundred eighty-one".